5.4.3.8 additional information during the first half of the reaction pyridoxamine 5'-phosphate is converted to pyridoxal 5'-phosphate, while pyridoxamine 5'-phosphate is regenerated in the second half of the reaction upon 5-aminolevulinate formation 746660 5.4.3.8 additional information in both the pyridoxamine 5'-phosphate- and pyridoxal 5'-phosphate-bound structures, the gating loops are well-defined in electron density and are in the ordered open conformation. The conformation of the gating loop is symmetrical 747005 5.4.3.8 pyridoxal 5'-phosphate - 649844, 653764 5.4.3.8 pyridoxal 5'-phosphate a pyridoxamine 5'-phosphate (PMP)/pyridoxal 5'-phosphate (PLP)-dependent enzyme, binding structure with a Schiff base linkage between the cofactor and the epsilon-amino group of Lys286, overview 747005 5.4.3.8 pyridoxal 5'-phosphate a pyridoxamine 5'-phosphate (PMP)/pyridoxal 5'-phosphate (PLP)-dependent enzyme, binding structure, overview 746660 5.4.3.8 pyridoxal 5'-phosphate acts as cofactor and stimulates 3438 5.4.3.8 pyridoxal 5'-phosphate cofactor is bound by a Schiff base to the protein 3435 5.4.3.8 pyridoxal 5'-phosphate dependent on 703619, 714041, 716103 5.4.3.8 pyridoxal 5'-phosphate dependent on, during the catalytic cycle, the cofactor undergoes conversion from pyridoxamine 5'-phosphate to pyridoxal 5'-phosphate, conformational changes and binding structures, overview 727125 5.4.3.8 pyridoxal 5'-phosphate pyridoxal 5'-phosphate binding site 3444 5.4.3.8 pyridoxal 5'-phosphate required 3436 5.4.3.8 pyridoxamine 5'-phosphate a pyridoxamine 5'-phosphate (PMP)/pyridoxal 5'-phosphate (PLP)-dependent enzyme, binding structure, overview 746660, 747005 5.4.3.8 pyridoxamine 5'-phosphate cofactor 3440 5.4.3.8 pyridoxamine 5'-phosphate conversion into the active pyridoxamine-phosphate form of enzyme in an exponential process 3442 5.4.3.8 pyridoxamine 5'-phosphate dependent on 703619, 714041 5.4.3.8 pyridoxamine 5'-phosphate only the pyridoxamine form of the enzyme is active 3439 5.4.3.8 pyridoxamine 5'-phosphate stimulates 3429 5.4.3.8 pyridoxamine 5'-phosphate the pyridoxal-phosphate form of the enzyme and the pyridoxamine-phosphate form of the enzyme are similarly active 3441 5.4.3.8 vitamin B6 subunits show asymmetry in cofactor binding 3445 5.4.3.8 vitamin B6 wild-type enzyme and gabaculine-resistant mutant enzyme contain vitamin B6 3430